A source close to Jenner revealed she's a "complete outcast" after falling out with her family

The pair have recently been spotted getting close and though Jenner has insisted she's "just friends" with the model, new reports suggest the pair are planning on tieing the knot.

According to The Mirror, Jenner turned to the 21-year-old after her relationship with the Kardashians broke down. Jenner, 61, has reportedly cut ties with her family since the release of her 2017 autobiography The Secrets Of My Life.

A source close to Heat magazine said: "Cait really sees herself spending the rest of her life with Sophia.

"She lost her support system when she fell out with her family and these days, it feels like Sophia's the only person she can count on."

The source also revealed that Jenner, a Trump supporter, is "a complete outcast at the moment" who "lost friends in the LGBT community because of her political views".

"She was really hoping to reconnect with the Kardashians, especially with Khloe and Kim having had babies, but sadly she hasn't met them, and she hasn't even got to spend much time with her new granddaughter Stormi," the source added.

"She just wants some companionship and really felt all alone before she met Sophia."

The pair, who currently live together, are reportedly planning an intimate ceremony near Caitlyn's home in Malibu, California.